TG, first I'd like to say how sorry I am you are facing this heartbreak.
I can see, from experience, how stepping away from SI, IC, or MC can be alright for some and not for others. For some, the A reminder, as awful as it is, may have to be a consistent, constructive action(SI,IC,MC) in order to keep the boundaries safe.
Your post reminds me of the questions that I have asked myself and WSO when I feel he has crossed boundaries:
*Can you see how that behavior is disrespectful to us, R, me and you?
*Is there any correlation in that behavior and your A?
*Is that behavior more important than R and my feelings?
*Why or how do you not enforce the boundaries that I thought we agreed upon?
I think 2 people with different internal boundaries can live together, but after infidelity, it becomes glaringly obvious how important shared M boundaries are for protection. I now recognize how little respect and concern we had for our pre-A boundaries.
I honestly don't think WSO would be too upset if I did some of the things that I now have a problem with him doing, after the A. I'm happy and pleased with my internal boundaries that protect me and our relationship. I recogize that his internal boundary changes have not come naturally, if that makes sense. This has been in stark contrast to years of no thoughts about establishing boundaries, much less enforcing them.
You obviously, and rightfully so, aren't ok with HL and his choices and behavior regarding his co-worker. Your internal boundaries recognized some red flags a few months ago. I question whether some WS/WSO can happily live with the strong internal boundaries of their BS/BSO as much as we question whether we can live with the lack of their internal boundaries?
The real problem arises when our boundaries collide regarding issues like the one you are facing, as well as myself over the course of R. The majority of what I have worked on and changed, occurred after the A. The A had that much of an impact on me.
I remember reading HL's posts and his involvement with SI. This goes back to what I said earlier. He may be someone who cannot remove himself from or stay away from the R and self-healing environment. He may need the tutorials and accountablity that comes with IC and SI to keep his internal boundaries safe. I think that is the case with WSO.
It bothers me that HL chose to continue the behavior with the co-worker after you voiced your concern. He pulled away from you, avoiding the conflict/discussion. It seems that he is relapsing, if you could call it that, instead of proving that he adopted all that he learned. I hope he can share with you how and why he allowed himself to tune out your feelings.
Wishing the best for you and HL.